DKIM Record Checker
DKIM signs outgoing emails. Receivers verify the signature using a public key in DNS.
DKIM lives on <selector>._domainkey.<domain>. If selector is empty, we try common ones.
Result for pnc.com
Found
Selector: smtp
(TXT on smtp._domainkey.pnc.com)
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArPN1Nz15enSUgr7UrEVummBhWUgq2LlXNKzWsklKyO/pGvz8HujcAuWM8bt3ui2XnPnw12UHHJlRAj3PxjQwxQfvhfGOT+mR+j2JjDJuqhKBIcC4ug14MqSQ5oU7dfnrO+SvPC0QPfzBQLxYSMbay0zNIcVXMdAus12S+31U3zP/ASNiCjgKgUjSZaptmwn6EBNktXLkeUFA1IDKYL+TQ0en/zUbCzNCCFYBRUIYtHPD6uyAFvsf4tpgq5/S909HChTvAHinQh+2vqu4T8E+SvwW3d67ahmHJmuzJQ/29TKO2m+i8BQgw1+zurwcUCxRUQulP9Cp8sHWzJ7E48ivyQIDAQAB
FAQ
Why does DKIM require a selector?
Selectors allow rotating keys and running multiple keys per domain.
Where is DKIM published?
TXT on <selector>._domainkey.<domain>.
DKIM record exists but emails still fail DKIM?
Signing may be disabled or the selector used in email differs from DNS.
Do I need DKIM if I have SPF?
Yes, many providers use both for best deliverability and DMARC alignment.
Can I have multiple DKIM selectors?
Yes, that is common for key rotation or multiple senders.
What is DKIM?
DKIM (DomainKeys Identified Mail) adds a cryptographic signature to outgoing emails. DNS stores a public key that allows receivers to verify authenticity.
Example
v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0B...
Common mistakes
- Wrong selector (the record exists but under a different selector).
- Key is split incorrectly across multiple TXT chunks (some DNS UIs break it).
- Publishing DKIM but not enabling signing on the mail provider.